"It is the sauce that distinguishes a good chef. The Saucier is a soloist in the orchestra of a great kitchen." - Fernand Point
So true! You can saute a chicken breast to perfection and make a great meal, but if you know how to make simple pan sauces, you can prepare a hundred different meals. Furthermore, you are going to find every cuisine has it's own style of sauces, some similar, some completely different.